Cheapest return flights from Washington to London in May from $601

AirHint found the following cheapest return flights from Washington (IAD) to London (STN) in May 2026 (see full year).

Return flights

06 May - 12 May Aer Lingus
05 May - 12 May Aer Lingus
05 May - 21 May Turkish Airlines
05 May - 15 May Turkish Airlines
11 May - 16 May Icelandair
13 May - 17 May Turkish Airlines
06 May - 24 May Turkish Airlines
01 May - 18 May TAP
13 May - 25 May Turkish Airlines
06 May - 10 May Turkish Airlines
21 May - 01 Jun Scandinavian Airlines
31 May - 10 Jun Turkish Airlines
25 May - 08 Jun Turkish Airlines

Also check the deals for one-way flights from Washington to London in May.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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